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MAX971CUA-T |MAX971CUATN/a134avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX971CSA+ |MAX971CSAMAXIMN/a100avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX971CSA+TMAXIX ?N/a554avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX971CSA+T |MAX971CSATMAXN/a889avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX971ESA+ |MAX971ESAMAXIMN/a135avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX972CSA+ |MAX972CSAMAXIMN/a11avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX972CUA+ |MAX972CUAMAXIMN/a5avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX972ESA+ |MAX972ESAMAXIMN/a180avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX973CSA+ |MAX973CSAMAXIMN/a27avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX973CUA+ |MAX973CUAMAXIMN/a70avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX973ESA+N/AN/a2500avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX973ESA+ |MAX973ESAMAXIMN/a115avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX974CSE+ |MAX974CSEMAXIMN/a25avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX981CSA+TN/AN/a2500avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX981CSA+N/AN/a2500avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX982CSA+ |MAX982CSAMAXIMN/a70avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX982CUA+ |MAX982CUAMAXIMN/a420avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX982ESA+ |MAX982ESAMAXIMN/a14avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX983CSA+ |MAX983CSAMAXIMN/a125avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX983CUA+ |MAX983CUAMAXIMN/a200avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX983ESA+ |MAX983ESAMAXIMN/a3250avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX984CSE+ |MAX984CSEMAXIMN/a13avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX984CSE+T |MAX984CSETMAXIMN/a119avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX984ESE+ |MAX984ESEMAXIMN/a50avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX984ESE-T |MAX984ESETMAXIMN/a1446avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
MAX984ESE-T |MAX984ESETMAXN/a1446avaiUltra-Low-Power, Open-Drain, Single/Dual-Supply Comparators


MAX983ESA+ ,Ultra-Low-Power, Open-Drain, Single/Dual-Supply ComparatorsELECTRICAL CHARACTERISTICS—5V OPERATION(V+ = 5V, V- = GND = 0V, T = T to T , unless otherwise noted ..
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MAX984CSE ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply Comparatorsapplications, thesedevices operate from a single +2.5V to +11V supply (or' Internal 1.182V ±1% Band ..
MAX984CSE ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply ComparatorsGeneral Description ________
MAX984CSE ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply ComparatorsApplicationsfor adding hysteresis without feedback or complicatedBattery-Powered Systems Level Tran ..
MAX984CSE+ ,Ultra-Low-Power, Open-Drain, Single/Dual-Supply ComparatorsMAX971–MAX974/MAX981–MAX98419-0450; Rev 3; 2/03Ultra-Low-Power, Open-Drain,Single/Dual-Supply Compa ..
MB89537AC , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89537H ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFEATURES• Wide range of package options• Two types of QFP packages (1 mm pitch, 0.65 mm pitch) • LQ ..
MB89538A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89538A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89557A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFEATURES• • Range of package options• •• LQFP package (0.5 mm pitch) • TQFP package (0.4 mm pitch) ..
MB89558A ,F2MC-8L/Low Power/Low Voltage Microcontrollersfeatures a compact instruction setand contains a range of peripheral functions including a dual- cl ..


MAX971CSA+-MAX971CSA+T-MAX971CUA-T-MAX971ESA+-MAX972CSA+-MAX972CUA+-MAX972ESA+-MAX973CSA+-MAX973CUA+-MAX973ESA+-MAX974CSE+-MAX981CSA+-MAX981CSA+T-MAX982CSA+-MAX982CUA+-MAX982ESA+-MAX983CSA+-MAX983CUA+-MAX983ESA+-MAX984CSE+-MAX984CSE+T-MAX984ESE+-MAX984ESE
Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators
General Description
The MAX971–MAX974 and MAX981–MAX984 single/
dual/quad low-voltage comparators feature the lowest
power consumption available. These micropower
devices draw less than 4µA supply current over
temperature (MAX971/MAX972/MAX981/MAX982), and
include an internal 1.182V ±1% (MAX971/MAX973/
MAX974) or ±2% (MAX981–MAX984) voltage reference
and programmable hysteresis.
Ideal for 3V or 5V single-supply applications, these
devices operate from a single 2.5V to 11V supply (or
±1.25V to ±5.5V dual supplies), and each comparator’s
input voltage ranges from the negative supply rail to within
1.3V of the positive supply.
The single MAX971/MAX981 and the dual MAX973/
MAX982/MAX983 provide a unique, simple method for
adding hysteresis without feedback or complicated
equations, simply by using the HYST pin plus two
resistors.
The MAX971–MAX974 and MAX981–MAX984’s open-
drain outputs permit wire-ORed configurations. Thanks to
an 11V output range and separate GND pin for the output
transistor (MAX971/MAX974, MAX981/MAX984), these
devices are ideal for level translators and bipolar to single-
ended converters. For similar devices with complementary
output stages, see the MAX921–MAX924 (1% reference)
and the MAX931–MAX934 (2% reference).
Features
Available in Ultra-Small Packages:
UCSP™(MAX972)
µMAX (MAX9_1/MAX9_2/MAX9_3)
Ultra-Low Quiescent Current (4µA, max)
Over Extended Temp Range (MAX971/MAX981)
Power Supplies:
Single 2.5V to 11V
Dual ±1.25V to ±5.5V
Input Voltage Range Includes Negative SupplyInternal Bandgap Reference
1.182V ±1% (MAX97_)
1.182V ±2% (MAX98_)
12µs Propagation Delay (10mV Overdrive)Output Has Separate GND Pin (MAX9_1/MAX9_4)
Applications
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators

MAX971
MAX981
OUT
IN+
HYST
REFGND
IN-
THRESHOLD DETECTOR

VIN
Typical Operating Circuit

19-0450; Rev 3; 2/03
Ordering Information continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.
PARTINTERNAL PRECISION REFERENCEINTERNALHYSTERESISPACKAGE

MAX9711%Yes8-Pin
DIP/SO/µMAX
MAX972NoneNo8-Pin UCSP/
DIP/SO/µMAX
MAX9731%Yes8-Pin
DIP/SO/µMAX
MAX9741%No16-Pin DIP/SO
MAX9812%Yes8-Pin
DIP/SO/µMAX
MAX9822%Yes8-Pin
DIP/SO/µMAX
MAX9832%Yes8-Pin
DIP/SO/µMAX
MAX9842%No16-Pin DIP/SO
COMPARATORS PERPACKAGE

Ordering Information
PARTTEMP RANGEPIN-PACKAGE
MAX971CPA
0°C to +70°C8 Plastic Dip
MAX971CSA0°C to +70°C8 SO
MAX971CUA0°C to +70°C8 µMAX
Battery-Powered
Systems
Threshold Detectors
Window Comparators
Level Translators
Oscillator Circuits
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators

V+ to V-, V+ to GND, GND to V-................................-0.3V, +12V
Inputs
Current: IN_+, IN_-, HYST..............................................20mA
Voltage: IN_+, IN_-, HYST...............(V+ + 0.3V) to (V- - 0.3V)
Outputs
Current: REF...................................................................20mA
OUT_................................................................50mA
Voltage: REF....................................(V+ + 0.3V) to (V- - 0.3V)
OUT_ (MAX9_1/9_4)..................12V to (GND - 0.3V)
(MAX9_2/9_3).......................12V to (V- - 0.3V)
OUT_ Short-Circuit Duration ..................................Continuous
Continuous Power Dissipation (TA= +70°C)
8-Bump UCSP (derate 4.7mW/°C above +70°C)........379mW
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
16-Pin SO (derate 8.70mW/°C above +70°C)................696mW
Operating Temperature Ranges
MAX97_C_ _/MAX98_C_ _..................................0°C to +70°C
MAX97_E_ _/MAX98_E_ _...............................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Bump Temperature (soldering)
Reflow..........................................................................+235°C
ELECTRICAL CHARACTERISTICS—5V OPERATION

(V+ = 5V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ABSOLUTE MAXIMUM RATINGS
PARAMETERCONDITIONSMINTYPMAXUNITS
POWER REQUIREMENTS

Supply Voltage Range(Note 2)2.511V
Output Voltage Range011V
TA = +25°C2.53.2MAX9_1,
HYST = REFC/E temp ranges4
TA = +25°C2.53.2MAX972C/E temp ranges4
TA = +25°C3.14.5MAX982/
MAX9_3,
HYST = REFC/E temp ranges6
TA = +25°C5.56.5
Supply Current
IN+ = IN- +
100mV
MAX9_4C/E temp ranges8.5
COMPARATOR

Input Offset VoltageVCM = 2.5V±10mV
Input Leakage Current (IN-, IN+)IN+ = IN- = 2.5VC/E temp ranges±0.01±5nA
Input Leakage Current (HYST)MAX9_1/MAX982/MAX9_3±0.02nA
Input Common-Mode Voltage
RangeV-V+ - 1.3V
Common-Mode Rejection RatioV- to (V+ - 1.3V)0.11.0mV/V
Power-Supply Rejection RatioV+ = 2.5V to 11V0.11.0mV/V
Voltage Noise100Hz to 100kHz20µVRMS
Hysteresis Input Voltage RangeMAX9_1/MAX982/MAX9_3REF - 0.05REFV
Overdrive = 10mV12Response Time (High-to-Low
Transition)
TA = +25°C, 100pF load,
1MΩ pullup to V+Overdrive = 100mV4µs
Response Time (Low-to-High
Transition) (Note 3)TA = +25°C, 100pF load, 1MΩ pullup to V+300µs
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
ELECTRICAL CHARACTERISTICS—5V OPERATION (continued)

(V+ = 5V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
ELECTRICAL CHARACTERISTICS—3V OPERATION

(V+ = 3V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS

MAX9_2/MAX9_3, IOUT = 1.8mAV- + 0.4
Output Low VoltageMAX9_1/MAX9_4, IOUT = 1.8mAGND
+ 0.4
Output Leakage CurrentVOUT = 11V100nA
REFERENCE (MAX9_1/MAX982/MAX9_3/MAX9_4 ONLY)

C temp range1%1.1701.1821.194MAX971/MAX973/
MAX974E temp range2%1.1581.206
C temp range2%1.1581.1821.206Reference Voltage
MAX981–MAX984E temp range3%1.1471.217
TA = +25°C1525Source CurrentC/E temp ranges6µA
TA = +25°C815Sink CurrentC/E temp ranges4µA
Voltage Noise100Hz to 100kHz100µVRMS
PARAMETERCONDITIONSMINTYPMAXUNITS
POWER REQUIREMENTS

TA = +25°C2.43.0MAX9_1C/E temp ranges3.8
TA = +25°C2.43.0MAX972C/E temp ranges3.8
TA = +25°C3.44.3MAX982/
MAX9_3C/E temp ranges5.8
TA = +25°C5.26.2
Supply Current
HYST = REF,
IN+ = (IN- +
100mV)
MAX9_4C/E temp ranges8.0
COMPARATOR

Input Offset VoltageVCM = 1.5V±10mV
Input Leakage Current (IN-, IN+)IN+ = IN- = 1.5VC/E temp ranges±0.01±5nA
Input Leakage Current (HYST)MAX9_1/MAX982/MAX9_3±0.02nA
Input Common-Mode Voltage
RangeV-V+ - 1.3V
Common-Mode Rejection RatioV- to (V+ - 1.3V)0.21mV/V
Power-Supply Rejection RatioV+ = 2.5V to 11V0.11mV/V
Voltage Noise100Hz to 100kHz20µVRMS
Hysteresis Input Voltage RangeMAX9_1/MAX982/MAX9_3REF - 0.05REFV
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
ELECTRICAL CHARACTERISTICS—3V OPERATION (continued)

(V+ = 3V, V- = GND = 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Note 1:
The MAX972EBL is 100% tested at TA= +25°C. Temperature limits are guaranteed by design.
Note 2:
MAX974/MAX984 comparators work below 2.5V; see Low-Voltage Operation section for more details.
Note 3:
Low-to-high response time is the result of the 1MΩpullup and the 100pF capacitive load, based on three time constants.
A faster response time is achieved with a smaller RC.
PARAMETERCONDITIONSMINTYPMAXUNITS

Overdrive = 10mV12Response Time (High-to-Low
Transition)
TA = +25°C, 100pF load,
1MΩ pullup to V+Overdrive = 100mV4µs
Response Time (Low-to-High
Transition) (Note 3)TA = +25°C, 100pF load, 1MΩ pullup to V+300µs
MAX9_2/MAX9_3, IOUT = 0.8mAV- + 0.4Output Low VoltageMAX9_1/MAX9_4, IOUT = 0.8mAGND + 0.4V
Output Leakage CurrentVOUT = 11V100nA
REFERENCE

C temp range1%1.1701.1821.194MAX971/MAX973/
MAX974E temp range2%1.1581.206
C temp range2%1.1581.1821.206Reference Voltage
MAX981–MAX984E temp range3%1.1471.217
TA = +25°C1525Source CurrentC/E temp ranges6µA
TA = +25°C815Sink CurrentC/E temp ranges4µA
Voltage Noise100Hz to 100kHz100µVRMS
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators

MAX9_1
SUPPLY CURRENT vs.
TEMPERATURE
MAX971-4/981-4 TOC4
TEMPERATURE (°C)
SUPPLY CURRENT (
V+ = 5V, V- = - 5V
V+ = 3V, V- = 0V
V+ = 5V, V- = 0V
IN+ = IN- + 100mV
MAX972
SUPPLY CURRENT vs. TEMPERATURE
MAX971-4/981-4 TOC5
TEMPERATURE (°C)
SUPPLY CURRENT (
IN+ = (IN- + 100mV)
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
V+ = 10V, V- = 0V
MAX982/MAX9_3
SUPPLY CURRENT vs. TEMPERATURE
MAX971-4/981-4 TOC6
TEMPERATURE (°C)
SUPPLY CURRENT (
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
MAX9_4
SUPPLY CURRENT vs. TEMPERATURE
MAX971-4/981-4
TOC7
TEMPERATURE (°C)
SUPPLY CURRENT (
IN+ = (IN- + 100mV)
V+ = 5V, V- = 0V
V+ = 3V, V- = 0V
V+ = 5V, V- = -5V
MAX9_4
SUPPLY CURRENT vs.
LOW SUPPLY VOLTAGES
MAX971-4/981-4 TOC8
SINGLE-SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
MAX9_1/MAX982/MAX9_3
HYSTERESIS CONTROL
MAX971-4/981-4 TOC9
VREF - VHYST (mV)
IN+ - IN- (V)40
NO CHANGE
OUTPUT LOW
OUTPUT HIGH
__________________________________________Typical Operating Characteristics

(V+ = 5V, V- = GND = 0V, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE LOW
vs. LOAD CURRENT
MAX971-4/981-4-TOC1
LOAD CURRENT (mA)
(V)
V+ = 5V
V+ = 3V
REFERENCE OUTPUT VOLTAGE vs.
OUTPUT LOAD CURRENT
MAX971-4/981-4 TOC2
OUTPUT LOAD CURRENT (μA)
REFERENCE OUTPUT VOLTAGE (V)20
V+ = 5V
V+ = 3V
SINK
SOURCE
MAX971/MAX973/MAX974
REFERENCE VOLTAGE vs. TEMPERATURE
MAX971-4/981-4 TOC3
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)100
EXTENDED TEMP RANGE
COMMERCIAL
TEMP RANGE
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
Typical Operating Characteristics (continued)

(V+ = 5V, V- = GND = 0V, TA = +25°C, unless otherwise noted.)
RESPONSE TIME
AT LOW SUPPLY VOLTAGES (VOHL)
MAX971-4/981-4 TOC13
SINGLE-SUPPLY VOLTAGE (V)
RESPONSE TIME (
-20mV
-100mV
RPULLUP = 10kΩ
MAX9_4
SINK CURRENT
AT LOW SUPPLY VOLTAGES
MAX971-4/981-4 TOC14
SINGLE-SUPPLY VOLTAGE (V)
CURRENT (mA)
SINK CURRENT AT VOUT = 0.4V
SHORT-CIRCUIT SINK CURRENT
vs. SUPPLY VOLTAGE
MAX971-4/981-4 TOC15
TOTAL SUPPLY VOLTAGE (V)
SINK CURRENT (mA)
OUT CONNECTED TO V+
GND CONNECTED TO V-
MAX9_1/MAX972/MAX9_4
TRANSFER FUNCTION
MAX971-4/981-4 TOC10
IN+ INPUT VOLTAGE (mV)
OUTPUT VOLTAGE (V)
100kΩ
+5V
10kΩ
10μF2060100
RESPONSE TIME vs.
LOAD CAPACITANCE
MAX971-4/981-4 TOC11
LOAD CAPACITANCE (nF)
RESPONSE TIME (80
V- = 0V
VOHL21018
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES (VOHL)

MAX971-4/981-4 TOC12
RESPONSE TIME (μs)
OUT
(V)
50mV
100mV
20mV
10mV
(mV)
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
PIN
MAX971/
MAX981MAX972MAX982MAX973/
MAX983
DIP/SO/
µMAX
DIP/SO/
µMAXUCSPDIP/SO/
µMAX
DIP/SO/
µMAX
NAMEFUNCTION
————GNDGround. Connect to V- for single-supply operation.2C222V-Negative Supply. Connect to GND for single-supply
operation (MAX9_1).————IN+Noninverting Comparator Input————IN-Inverting Comparator Input——55HYSTHysteresis Input. Connect to REF if not used. Input
voltage range is from VREF to (VREF - 50mV).——66REFReference Output. 1.182V with respect to V-.7A277V+Positive Supply————OUTComparator Output. Sinks current to GND.1A111OUTAComparator A Open-Drain Output. Sinks current to V-.3C133INA+Noninverting Input of Comparator A4B1——INA-Inverting Input of Comparator A5B3—4INB-Inverting Input of Comparator B6C34—INB+Noninverting Input of Comparator B8A388OUTBComparator B Open-Drain Output. Sinks current to V-.
Pin Description
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
Pin Description (continued)

Comparator C Open-Drain Output. Sinks current to GND. OUTC16
Comparator D Open-Drain Output. Sinks current to GND.OUTD15
Ground. Connect to V- for single-supply operation.GND14
Noninverting Input of Comparator DIND+13
Inverting Input of Comparator DIND-12
Noninverting Input of Comparator CINC+11
Inverting Input of Comparator CINC-10
Negative Supply. Connect to ground for single-supply operation.V-9
Reference Output. 1.182V with respect to V-.REF8
Noninverting Input of Comparator BINB+7
Inverting Input of Comparator BINB-6
Noninverting Input of Comparator AINA+5
Inverting Input of Comparator AINA-4
Positive SupplyV+3
Comparator A Open-Drain Output. Sinks current to GND. OUTA2
Comparator B Open-Drain Output. Sinks current to GND. OUTB1
FUNCTIONNAME
PIN
MAX974
MAX984
MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
Detailed Description

The MAX971–MAX974/MAX981–MAX984 comprise
various combinations of a micropower 1.182V reference
and micropower comparators. The Typical Operating
Circuitshows the MAX971/MAX981 configuration, and
Figures 1a–1d show the MAX9_2–MAX9_4 configurations.
Internal hysteresis in the MAX9_1, MAX982, and
MAX9_3 provides the easiest method for implementing
hysteresis. It also produces faster hysteresis action and
consumes much less current than circuits using external
positive feedback.
Power-Supply and Input Signal Ranges

This family of devices operates from a single 2.5V to 11V
power supply. The MAX9_1 and MAX9_4 have a
separate ground for the output driver, allowing operation
with dual supplies ranging from ±1.25V to ±5.5V.
Connect V- to GND when operating the MAX9_1 or
MAX9_4 from a single supply. The maximum total supply
voltage in this case is still 11V.
For proper comparator operation, the input signal can
range from the negative supply (V-) to within one volt of
the positive supply (V+ - 1V). The guaranteed common-
mode input voltage range extends from V- to (V+ -
1.3V). The inputs can be taken above and below the
supply rails by up to 300mV without damage.
OUTA
INA+
INA-
OUTB
INB+
INB-
MAX9721 (A1)
2 (C2)
3 (C1)
4 (B1)
8 (A3)
7 (A2)
6 (C3)
5 (B3)
( ) BUMPS FOR THE UCSP
Figure 1a. MAX972 Functional Diagram
OUTA
INA+
INB-
OUTB
REF
HYST
MAX9_31
Figure 1c. MAX973/MAX983 Functional Diagram
(Window Comparator)
OUTA
INA+
INB+
OUTB
REF
HYST
MAX9821
Figure 1b. MAX982 Functional Diagram
OUTA
INA-
INA+
OUTD
GND
IND+
IND-
MAX9_4
OUTB
INB-
INB+
REF
OUTC
INC+
INC-
Figure 1d. MAX974/MAX984 Functional Diagram
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